kube32

What is kube32?

kube32 provides a Kubernetes-compatible control plane and WebAssembly runtime for ESP32-S3 microcontrollers. Teams manage clusters over Wi-Fi or USB serial using kubectl and k9s. Boards run a single firmware image acting as a control plane node or worker. A host simulator supports macOS and Linux for pre-deployment testing.

Application logic runs as WebAssembly modules via the wasm3 interpreter. Developers use Rust, C, or AssemblyScript with included SDKs. The system exposes full Kubernetes API resources like services, deployments, and metrics. Built-in routing handles HTTP ingress, server-sent events, and pod-to-pod calls. Peripheral access is restricted per pod through a capability firewall covering GPIO, buses, displays, and storage.

Operations include automatic lifecycle management, restart policies, and verified firmware rollouts with bootloader fallback. Optional authentication and TLS secure traffic. Event bridging uses ESP-NOW and UDP. The project uses the Apache-2.0 license and ships a CLI for building and deploying workloads.

kube32 features

• Full Kubernetes API compatibility for kubectl and k9s
• WebAssembly pod execution via wasm3 interpreter
• Service routing, HTTP ingress, and SSE stream support
• Capability firewall for safe peripheral access
• Automatic firmware rollouts with bootloader rollback
• Pub-sub event bridging across cluster nodes
• Host simulator for macOS and Linux testing

Who uses kube32 and for what

• Manage multiple ESP32-S3 boards as a unified IoT cluster
• Deploy WebAssembly modules to edge devices without recompiling native code
• Test Kubernetes workflows locally using the host simulator before hardware deployment
• Securely route HTTP traffic and manage static assets across distributed microcontrollers
• Monitor device health and logs using standard Kubernetes metrics and log tailing

kube32 FAQ

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